Water-heating coil



- 1546560. J. P.-REINECKE WATER HEATING OIL Oct. 25, 1927.'

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Patented Oct. 25, 1927.

- UNITED smm- COMPANY, OF LOUISVILLE, KENTUCKY, A CORPORATION OF OHIO.

WATER-HEATING COIL. I

Application filedNovember 21, 1925. Serial No. 7o,442.

This invention relates to water-heating` devices and more particularly to the tubular coil-type of device in which the water passes through the coil and is heated by the hot gases which are caused to ciroulate around the coil. V

In the coil-type of heaters heretofore used, consi'derable difficulty has been encountered as a result of the conden'sation of the Water vapor, contained' in the hot gases by contact with the re'latively cool. surfaces of the coil and. it is one of the objects of the invention to provide a construction that. will largely overcome this difficulty and also' have the water circulated through the coil in such a way as to maintain the maximum difference of temperature i between the' water in the various portions of thecoil and the surrounding gases.

Other objects of the 'invention and the features of novelty will be apparent from the following description taken in connection with the accompanyingdrawings, of which: r p

Fig'gl is an elevation shell being shown more or `less diagranimatically in section and "certain parts being broken away to show parts of the coil that woulch otherwise, be concealed;

Fig. 2 is a plan View of the upper end of the heating coils; and i e Fig. 3 is a bottom plan View of the inner coil. r

Referring to the drawings, 10 indicates a shell or casing having a burner 11 in its lower part, this bur-ner being-diagram matically shown' and, for the purposes of the 'present invention, may be of any preferred type such as any of the commercial "forms of gas burners now coinmonly used. In accordance with my invention, I provide an inner or pre-heating coil having an inlet at 12, the lower end of this' coil being in the form of aconical spiral 13 above which there is a helical coil 14 ext'ending to the upper end of the heaterx surrounding the inner bend 16 which is connected to the upper ends of a heating de-' vice embodyingimy invention, the enclosing' of the coils 14: and 15 by means ofcou plngsl?. The lower end of the coil 15 is in- 'dicated at'l8 and constitutesthe discharge end, the inlet 12 and` the dscharge- 18 being located adjacent to each other and in the I `region of the hottest gases directly above the burner ll.

By having the cold point 12 and first circulate ;through the' splral portion 13 of the inner coil, the water :s preliminarily heated but the' hot gases are not sufliciently 1 reduced in temperature to cause an 'objectionable amountof condensa-i tion'o'f the water vapor. The course ofthe water enter tat' the PATEN-r QFFCE.

JOHN PQREINECKE, or LOUISVILLE, KENTUCKY, ASSIGNOR To T E HOFFMAN HEATEjag water isupwardly through the inner coil 14, I

thence through the connection l6 to' the up-- per end of the outer .coil whence it flows downwardly 'through this coil 'to the dis c h arge 18 so that the hottest -waterxis contaned 111 the lower convolutions of the outer coil and in the region of the hottest gases,

thereby-avoiding condensation on 'the outer col. The arrangement of the coils and the method of crculating 'the water therethrough nsures high heating eciency and a relatvely large ?difference of temperature between all portions' of the coils and the` i' i surrounding gases so that by the timethe gases reach the outlet 19, they willbe so rea duced in temperaturethat only a'veryusmall i i' i amount of the available heat will be 'wasted T provision of'the connection lxafiords i' I a desgnthat lends itself readily to efiicient a nanufacturing and also makes it convenient* to remove either of the coils whenever' necessary.

I claim is: V a In wateuheating devices, a vertically arranged coil having tion at the bottom, an outer coilsurrounding said inner coil and detachably connecti edtherewith at the top, said inner coilhav-' ing an inlet at the periphery of 'said spiral portion and said outer'coil having an' out- Having thus described my invention, what I an enlarged spiralrporlet at its lower end whereby the' course of the 4 i water is upwardly th-rough. said inner coil a and 'then downwardl'y; through said outer;

coil, and a burner arranged. below said coils.

In testimony whereofl I hereunto affix my sgnature;

p JOHN P. mmm. 

